a telescope module: consisting of the telescope reflectors (1.1 m diameter) and two star trackers used for attitude sensing, with support structure. This module has the high demands on thermal stability and alignment accuracy.
a platform: where on the inside, the spacecraft data handling and sensor electronics is placed. The outside houses the launcher interface ring, sun sensors and solar panel mechanisms.
a payload: consisting in a Sub-millimeter Microwave Radiometer (SMR) and and optical spectrometer with an ultraviolet near infrared spectroscopy capability (OSIRIS).

Satellite main characteristics:

Since launches to terminator orbits are uncommon, ODIN was designed for a dedicated launch. The satellite was launched by the Russian START-1, from Svobodny, Russia.